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The Triangle challenge

A program that will determine the type of a triangle. It should take the lengths of the triangle's three sides as input, and return whether the triangle is equilateral, isosceles or scalene.

Design:

1. An immutable Triangle class is used to represent a triangle. The constructor of this class takes as input, an integer array of exactly 3 sides. To avoid the "AnemicDomainModel" antipattern (refer to https://www.martinfowler.com/bliki/AnemicDomainModel.html), the Triangle class is responsible for computing its own type via a "computeTriangleType" method.

2. An enum is used to represent the 3 types of triangles namely: Equilateral, Isosceles and Scalene.

3. Units tests can be found in the class TriangleTest.